Option examples

Option	Description	Example
`-h`	nc -h	Help
`-z`	nc -z 192.168.1.9 1-100	Port scan for a host or IP address
`-v`	nc -zv 192.168.1.9 1-100	Provide verbose output
`-n`	nc -zn 192.168.1.9 1-100	Fast scan by disabling DNS resolution
`-l`	nc -lp 8000	TCP Listen mode (for inbound connects)
`-w`	nc -w 180 192.168.1.9 8000	Define timeout value
`-k`	nc -kl 8000	Continue listening after disconnection
`-u`	nc -u 192.168.1.9 8000	Use UDP instead of TCP
`-q`	nc -q 1 192.168.1.9 8000	Client stay up after EOF
`-4`	nc -4 -l 8000	IPv4 only
`-6`	nc -6 -l 8000	IPv6 only

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